1 files changed, 73 insertions, 0 deletions

diff --git a/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c b/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c
new file mode 100644
index 00000000..7296c673
--- /dev/null
+++ b/drivers/gpu/nvgpu/common/mm/nvgpu_mem.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 2017, NVIDIA CORPORATION.  All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <nvgpu/kmem.h>
+#include <nvgpu/nvgpu_mem.h>
+
+#include "gk20a/gk20a.h"
+
+struct nvgpu_mem_sgl *nvgpu_mem_sgl_next(struct nvgpu_mem_sgl *sgl)
+{
+        return sgl->next;
+}
+
+u64 nvgpu_mem_sgl_phys(struct nvgpu_mem_sgl *sgl)
+{
+        return sgl->phys;
+}
+
+u64 nvgpu_mem_sgl_dma(struct nvgpu_mem_sgl *sgl)
+{
+        return sgl->dma;
+}
+
+u64 nvgpu_mem_sgl_length(struct nvgpu_mem_sgl *sgl)
+{
+        return sgl->length;
+}
+
+/*
+ * This builds a GPU address for the %sgl based on whether an IOMMU is present
+ * or not. It also handles turning the physical address into the true GPU
+ * physical address that should be programmed into the page tables.
+ */
+u64 nvgpu_mem_sgl_gpu_addr(struct gk20a *g, struct nvgpu_mem_sgl *sgl,
+                           struct nvgpu_gmmu_attrs *attrs)
+{
+        if (nvgpu_mem_sgl_dma(sgl) == 0)
+                return g->ops.mm.gpu_phys_addr(g, attrs,
+                                               nvgpu_mem_sgl_phys(sgl));
+
+        if (nvgpu_mem_sgl_dma(sgl) == DMA_ERROR_CODE)
+                return 0;
+
+        return gk20a_mm_smmu_vaddr_translate(g, nvgpu_mem_sgl_dma(sgl));
+}
+
+void nvgpu_mem_sgl_free(struct gk20a *g, struct nvgpu_mem_sgl *sgl)
+{
+        struct nvgpu_mem_sgl *next;
+
+        /*
+         * Free each of the elements. We expect each element to have been
+         * nvgpu_k[mz]alloc()ed.
+         */
+        while (sgl) {
+                next = nvgpu_mem_sgl_next(sgl);
+                nvgpu_kfree(g, sgl);
+                sgl = next;
+        }
+}